Saturday, June 18, 2011

scooter

A scooter is a motorcycle with step-through frame and a platform for the operator's feet. Elements of scooter design have been present in some of the earliest motorcycles, and motorcycles identifiable as scooters have been made from 1914 or earlier. Scooter development continued in Europe and the United States between the World Wars.
The global popularity of scooters dates from the post-World War II introductions of the Vespa and the Lambretta. These post-war scooters were intended to provide low-power personal transportation (engines from 50 to 250 cc). The original layout is still widely used in this application. Maxi-scooters, with engines from 250 to 800 cc have been developed for Western markets.
Scooters are popular for personal transport, partly based on their low cost of purchase and operation and on benefits that include convenience in parking and storage. Licensing requirements for scooters are easier and less expensive than those for cars in most parts of the world, and insurance is generally cheaper.


A motor scooter is a motorcycle similar to a kick scooter with a seat. a floorboard, and small or low wheels. The United States Department of Transportation defines a scooter as a motorcycle that has a platform for the operator's feet or has integrated footrests, and has a step-through architecture.
The classic scooter design features a step-through frame and a flat floorboard for the rider's feet. This design is possible because most scooter engines and drive systems are attached to the rear axle or under the seat. Unlike a conventional motorcycle, in which the engine is mounted on the frame, most modern scooters allow the engine to swing with the rear wheel. Most vintage scooters and some newer retro models have axle-mounted engines with a manual transmission and the gear shift and clutch controls built into the left handlebar. Most newer scooters use a continuously variable transmission (CVT).
Scooters usually feature bodywork, including a front leg shield and body that conceals all or most of the mechanicals. There is often some integral storage space, either under the seat, built into the front leg shield, or both. Most scooters have small engines, 50 cc to 400 cc with a single cylinder, although maxi-scooters might have twin cylinder 400 to 800 cc engines.[citation needed]
Traditionally, scooter wheels are made of pressed steel, bolt on easily, and are often interchangeable between front and rear. Some scooters carry a spare wheel. Many recent scooters use conventional front forks with the front axle fastened at both ends, while some have twin shock rear swingarms

Scooter-like traits began to develop in motorcycle designs around the 1900s. In 1894, Hildebrand & Wolfmüller produced the first motorcycle that was available for purchase. Their motorcycle had a step-through frame, with its fuel tank mounted on the down tube, its parallel two-cylinder engine mounted low on the frame, and its cylinders mounted in line with the frame. It was water-cooled and had a radiator built into the top of the rear fender. It became the first mass-produced and publicly-sold powered two-wheel vehicle, and among the first powered mainly by its engine rather than foot pedals. Maximum speed was 40 km/h (25 mph). The rear wheel was driven directly by rods from the pistons in a manner similar to the drive wheels of steam locomotives. Only a few hundred such bikes were built, and the high price and technical difficulties made the venture a financial failure for both Wolfmüller and his financial backer, Hildebrand.
In France, the Auto-Fauteuil was introduced in 1902. This was basically a step-through motorcycle with an armchair instead of a traditional saddle. Production continued until 1922

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